In our daily operations, it is inevitable that there will be more or less malfunctions. For example, the occurrence of icing and ice blockage can be roughly attributed to several reasons:

1. During the testing process, if the doors of the three temperature shock test chambers are not closed, there may be icing in the working chamber;

2. If the three box temperature shock test chamber is turned on for a long time after the refrigeration evaporator is damaged, it will carry the water molecules in the freezing (storage) chamber with the water molecules in the air and enter the compressor;

3. When the compressor is pressurized for leakage testing, it will compress water vapor in the air into water, which will then be injected into the pipeline, causing ice blockage;

4. Excessive moisture in the refrigerant in the three temperature shock test chambers can cause ice blockage when filled;

5. The drying filter has aged and failed, losing its proper drying and water absorption function;

6. After the process tube is opened, it is not sealed and frost accumulates. In addition, it is only occasionally turned on, so the moisture in the air will be brought into the machine from outside the tube mouth. (Compressor that is not sealed and has been stored for a long time, after drying treatment, can be replaced with frost and used directly, which may also cause ice blockage.)